.px2rem(@name, @px){
    @{name}: @px / 75 * 1rem;
}
*{
    padding: 0;
    margin: 0;
    list-style: none;
    font-family: "微软雅黑";
}
body,html{
    width: 100%;
    height: 100%;
    background: #f4f4f4;
}
.fs(@w){
    .px2rem(font-size,@w);
}
.lh(@w){
    .px2rem(line-height,@w)
}
.pt(@w) {
   .px2rem(padding-top,@w)
}
.pb(@w) {
    .px2rem(padding-bottom,@w)
}
.pl(@w) {
    .px2rem(padding-left,@w)
}
.pr(@w) {
    .px2rem(padding-right,@w);
}
.mt(@w) {
    .px2rem(margin-top,@w);
}
.mb(@w) {
    .px2rem(margin-bottom,@w);
}
.ml(@w) {
    .px2rem(margin-left,@w);
}
.mr(@w) {
    .px2rem(margin-right,@w);
}
.fw {
    font-weight: bold;
}
.fz(@w) {
    .px2rem(font-size,@w);
}
.ma {
    margin: 0 auto;
}
.h(@w){
    .px2rem(height,@w);
}
.w(@w){
    .px2rem(width,@w);
}
.t(@w){
    .px2rem(top,@w);
}
.b(@w){
    .px2rem(bottom,@w);
}
.br(@w){
    .px2rem(border-radius,@w);
}
.flexbox {
    display: flex;
    display: -webkit-flex;
}
.header{
    .flexbox;
    justify-content: space-around;
    align-items: center;
    .h(115);
    background: #FFFFFF;
    
    .centerheader{
        .fz(50);
        .fw;
        color: #ff6902;
    }
}
.imgnav{
   .h(222);
    .flexbox;
    justify-content: space-around;
    align-items: center;
    background:#ffffff;
    dl{
        text-align: center;
        .fz(28);
    }
}
.knowlege{
    background: #FFFFFF;
    .mt(30);
    p{
        .fw;
    }
    .fz(33);
    ul{
        
        .flexbox;
        justify-content: space-around;
        align-items: center;
        .h(100);
    }
}
.zcdz{
    background: #FFFFFF;
    .mt(30);
    .fz(32);
    .fw;
}
.daizhangfuwu{
    background: #FFFFFF;
    .flexbox;
    dl{
        width: 50%;
        .flexbox;
        justify-content: space-around;
        align-items: center;
        dd span{
            color: #8d8d8d;
        }
    }
}
.rocket{
            width: 40px;
            height: 78px;
            background:url(../images/01.png) no-repeat;
            position: fixed;
            right: 50px;
            bottom: 100px;
            cursor: pointer;
            display: none;
        }
        .rocket.hover{
            background-image: url(../images/02.gif);
        }